66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
|
/*
|
||
|
|
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
||
|
|
* this file except in compliance with the License. You can obtain a copy
|
||
|
|
* in the file LICENSE in the source distribution or at
|
||
|
|
* https://www.openssl.org/source/license.html
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "internal/cryptlib.h"
|
||
|
|
#include <openssl/rand.h>
|
||
|
|
#include <openssl/rsa.h>
|
||
|
|
#include <openssl/evp.h>
|
||
|
|
#include <openssl/objects.h>
|
||
|
|
#include <openssl/x509.h>
|
||
|
|
|
||
|
|
int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
|
||
|
|
unsigned char **ek, int *ekl, unsigned char *iv,
|
||
|
|
EVP_PKEY **pubk, int npubk)
|
||
|
|
{
|
||
|
|
unsigned char key[EVP_MAX_KEY_LENGTH];
|
||
|
|
int i;
|
||
|
|
int rv = 0;
|
||
|
|
|
||
|
|
if (type) {
|
||
|
|
EVP_CIPHER_CTX_reset(ctx);
|
||
|
|
if (!EVP_EncryptInit_ex(ctx, type, NULL, NULL, NULL))
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if ((npubk <= 0) || !pubk)
|
||
|
|
return 1;
|
||
|
|
if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (EVP_CIPHER_CTX_iv_length(ctx)
|
||
|
|
&& RAND_bytes(iv, EVP_CIPHER_CTX_iv_length(ctx)) <= 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
if (!EVP_EncryptInit_ex(ctx, NULL, NULL, key, iv))
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
for (i = 0; i < npubk; i++) {
|
||
|
|
ekl[i] =
|
||
|
|
EVP_PKEY_encrypt_old(ek[i], key, EVP_CIPHER_CTX_key_length(ctx),
|
||
|
|
pubk[i]);
|
||
|
|
if (ekl[i] <= 0) {
|
||
|
|
rv = -1;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
rv = npubk;
|
||
|
|
err:
|
||
|
|
OPENSSL_cleanse(key, sizeof(key));
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
i = EVP_EncryptFinal_ex(ctx, out, outl);
|
||
|
|
if (i)
|
||
|
|
i = EVP_EncryptInit_ex(ctx, NULL, NULL, NULL, NULL);
|
||
|
|
return i;
|
||
|
|
}
|